Electric-light socket.



- F. T. M0,RBLA ND. ELECTRIC LIGHT SOCKET. AP'TLIOATION FILED um 1, 1912.

Patented spt. 1o, 19.12.

Mums-SHEET 1. v /y/E//d, I'

F. T. MORELAND.

ELECTRIC LIGHT SOCKET. n v Arrmmrolr um) Arnd. 1912.

1,038,111 5. j` Banented sept. 1o, 19.12.

UNITED sTATEs PATENT oEEIoE. l

FRANI'. T. MORELAND, 0F OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-HALF TOPETER H. PETERSEN, OF OAKLAND, CALIFORNIA.

ELECTRIC-LIGHT SOCKET.

Specification of Letters Patent.

Patented Sept. 10,1912.

Application led April 1,1912. Serial No. 687,653.

To all whom z't may concern.'

Be it known that I, FRANK T. MORELAND, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Electric- Light Sockets, of which the following is a specification.

This invention relates to improvements in electric light sockets.

One object of the invention is to provide Fig. 3 is a vertical section on a line at right angles to that of Fig. 1, Fig. 4 is a top plan view of the porcelain plug removed from the socket, Fig. 5 is a bottom plan view of the plate 14, Fig. 6 is an elevation of ther socket removed from the casing, Fig. 7 is a vertical section of the socket member for the incandescent bulb, Fig. 8 is a bottomL plan view of the porcelain plug.

Referring particularly to the drawings, 10

represents the porcelain base1 of the socket,

in one side of which is formed a curved slot 11 which leads into a lateral opening 12 through which the key, to be later referred to, projects. In rthe base is formed a recess 13 in which the parts of the key and switch are adapted to be seated. Arranged over the porcelain base 10 is a porcelain disk 14 having secured thereto a pair of vertically arranged parallel supports 15 in which supportsis journaled the shaft 16 of. the key, said key having the usual hard rubber button or thumb piece 17 onone end, which projects through the opening 12 before mentioned. Secured to the face of the disk 14C is a contact spring 18, which projects between the supports 15 and has its. free end located over the contact screw 19, said screw 19 secured to the spring 20 on the opposite side of the disk, said spring being of a construction similar to the spring provided withV 18, but extending in the opposite direct-ion. The spring 20 is adapted to be engaged by the metallic point 21 of thev stem of the in candescent bulb 22. A suitable binding screw 23 is attached to one of the supports 15 to which is attached the wire 24C and a metallic plate 25 is secured to the opposite end of the base 10, in the manner to be described later in connection with the lamp receiving socket member, said plate having a binding screw 26 to which the terminal of 'the wire 27 is attached.

.fi lamp receiving socket 28 is arranged on the porcelain disk 14, said member being the attaching flange 29, formed with suitable openings to receive the screws 8O and 31. The screws pass entirely through the disk 14e` and the base 10, the

screw entering into a threaded opening in the plate 25 before described, while the screw 31 is secured at the opposite end by means of a nut 32, countersunk in the face ofthe base 10. The socket member 28 is` cylindrical and has secured to its inner face,

near its unattached end, t-he ribs Varranged diametrically opposite each other, the opposing ends of said ribs being spaced apart on diametrically opposite sides to provide a pair of vertical ways 34 to receive the oppositely extending lugs 35 on the stern of the lamp 37. The lower corners of the ribs 33 are rounded, and the lower edge of each of said ribs is curved upwardly toward' the center of its longitudinal dimension, so `that when the stem of the lamp is inserted so that the lugs passeddown from the ways 34, the point 21 will depress the spring 2O so that said lugs may be turned to engage the lower edges of the ribs. Upon slight rotary movement of the lamp the lugs 35 will ride to the highest point of the lowerA edges of the ribs and be heldV there by the upward pressure of the spring 20 t aga-inst the point 21. .j 1;,

Centrally oir the shaft 16 is an elongated disk 16 which when the said shaft 16 is turned will depress the spring 18 to engage withthe screw 19, so that the current flowing in through the wire 24 passes through the supports 15 the shaft 16 and disk '16', the spring 18 and screw 19, and the spring 20. From the spring 20 the current enters the llamp through the point 21,1 through the filament back through the stem of the lamp to the socket member 28 and out thrdugh the wire 27 by 4means of the screw 30, which is attached to the plate 25 carrying said wire27, as before described.

The parts described are disposed within a casing of suitable material as represented at 36. It will also be noted that the wire 30 is adapted to lie in the curved groove 11 for-med in the'porcelain base' 1Q so that the said casing may be readily slipped over the parts. 1 y

From the oregoingit will readily be seen that I have provided a simple device of this character in which a good contact is made between vthe point of the lamp and the contact spring and also with the socket member. It will also be noted that the spring` 20' serves the double function of forming a more perfect contact at the point of the stem, and also holds the lamp within the socket member 28, its resiliency forcing the bulb upwardly so that the lugs are forced Ainto positive engagement. with vthe said socket member. J

A shell of insulation 37 1s disposed between the' parts of the socket and the casing 36.

What is claimed is:

l. An incandescent lamp socket compris ing a porcelainbase member provided with a recess, a porcelain disk mounted on the base, and covering said recess, a pair of snpports mounted on the disk, a key shaft journaled in the supports, conductingwire connectingone of the supports, an elongated disk mounted on the ke shaft, a Contact; spring secured to the disk and extending between the supports in the path of thev disk, a contact secured in the disk disposed below the free end of the spring, a ylamp socket member mounted on the disk, attach- .ing screws for securing the socket member to the disk, one of said screws passing through the disk and base, a metallic plate secured to the end of said screw, a wire attached to said plate, and means on the socket member for engagement with the lamp' whereby positive contact is made bctween the stern of the lamp and the socket member. x

2. The combination with an incandescent lamp having a stem provided with oppositely. extending lugs of an electric light socketri base carrying a key switch, a spring on the socket in electrical connection. with the switch( a tubular socket member, ribs ,mounted in'the socket member near its outer gend, the opposing ends of the said ribs being spaced apart to provide diainetrically opposite vertical ways, the lower edge portion. of each of the ribs being upwardly curved longitudinally, whereby when the stem is in.- serted in said socket member, the lugs will. pass through the ways to engage the upwardly curved edge portions of the ribs, and will be forced upwardly thereagainst by means of said spring. e

ln testimony whereof I aiiix my signature, in the presence of two witnesses. FRANK T. MORELAND.

Witnesses:

EDWARD J. MGVEIGH,

FRANK VAL'LApoN. 

